…There’s also a lot that’s unlikely to convince 26-year-old developers and designers that they should be “doing accessibility.” […] The worst thing about this skepticism is that it obscures the fact that there’s really only one reason that’s important:
It’s the right thing to do.
And not just the right thing; it’s profoundly the right thing to do, because the one argument for accessibility that doesn’t get made nearly often enough is how extraordinarily better it makes some people’s lives. Personally, I don’t think anyone should need more than this one example: Blind people with access to a computer can now read the daily newspaper on their own. Imagine that.
Steve Krug, Excerpt from Chapter 11 of Don’t Make Me Think.